“China holds an optimistic attitude toward the talks on Iran’s nuclear program. We believe we can reach the goal of solving the issue peacefully through joint efforts,” Wang said on Monday.

In their last round of talks before a November 24 deadline, Iran and the P5+1– Russia, China, Britain, France, the US and Germany – held nearly a week of intense negotiations in the Austrian capital, Vienna, on how to tackle the remaining obstacles that exist in the way of reaching a comprehensive agreement on Iran’s nuclear program.

The top Chinese negotiator said that his country “made positive and constructive suggestions” during the Vienna talks.

“We worked on topics where consensuses were likely to be made, and provided a clear vision of a possible resolution to serve as an important guideline and reference for the negotiations. China’s idea was welcomed and drew attention from both parties, who said the idea has been very useful,” said Wang.

He also said that the parties to the talks made positive comments regarding the progress made in recent negotiations, saying that the ground had been prepared for a comprehensive final deal.

Iran and the P5+1 decided to extend their discussions for seven more months in the search for a comprehensive agreement that would end a 12-year dispute on Iran’s peaceful nuclear work after they missed the Monday midnight deadline, which had been set by the negotiating sides themselves.

They agreed that the interim deal they signed in the Swiss city of Geneva last November will remain in place during the course of the new negotiations until July 1, 2015.